Battery pack



FIG. 1 is a top-right perspective view of the design for the battery pack, showing a strap stowed;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a top-right perspective view of the battery pack of FIGS. 1 through 7, but showing the strap deployed.

The portions shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a battery pack, substantially as shown and described. 